基于雷德贝格电磁感应透明度的激光锁定泽曼子水平,扫描范围为 0.6 千兆赫。

IF 1.3 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Alexey Vylegzhanin, Síle Nic Chormaic, Dylan J Brown
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引用次数: 0

摘要

我们提出了一种将激光频率锁定到 87Rb 的 5P3/2 中间态和 32D5/2 Rydberg 态之间的 Zeeman 子级转变的技术。通过改变外加磁场,这种方法可以实现 0.6 GHz 以上的连续频率调谐。在外加磁场的作用下,原子蒸汽的电磁诱导透明(EIT)光谱会根据磁场强度以及泵浦激光器和探针激光器的极化情况,通过泽曼效应发生分裂。我们的研究表明,480 nm 的泵浦激光器负责中间态和雷德贝格态的泽曼子级之间的转换,可以锁定到泽曼分裂的 EIT 峰。激光锁定的短期频率稳定性为 0.15 MHz,长期稳定性在 0.5 MHz 以内。在有外磁场和无外磁场时,激光锁定的线宽分别为 ∼0.8 和 ∼1.8 MHz。此外,我们还表明,在没有外加磁场和适当屏蔽的情况下,锁定点的频率偏移会因泵浦场的极化而产生 1.6 MHz 的峰峰值变化,而当锁定到泽曼子水平时,这种变化会减小到 0.6 MHz。所提出的技术对于涉及雷德堡原子的研究非常有用,因为在这种研究中,需要对激光频率进行大范围的连续调谐并稳定锁定。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rydberg electromagnetically induced transparency based laser lock to Zeeman sublevels with 0.6 GHz scanning range.

We propose a technique for frequency locking a laser to the Zeeman sublevel transitions between the 5P3/2 intermediate and 32D5/2 Rydberg states in 87Rb. This method allows for continuous frequency tuning over 0.6 GHz by varying an applied external magnetic field. In the presence of the applied field, the electromagnetically induced transparency (EIT) spectrum of an atomic vapor splits via the Zeeman effect according to the strength of the magnetic field and the polarization of the pump and probe lasers. We show that the 480 nm pump laser, responsible for transitions between the Zeeman sublevels of the intermediate state and the Rydberg state, can be locked to the Zeeman-split EIT peaks. The short-term frequency stability of the laser lock is 0.15 MHz, and the long-term stability is within 0.5 MHz. The linewidth of the laser lock is ∼0.8 and ∼1.8 MHz in the presence and absence of the external magnetic field, respectively. In addition, we show that in the absence of an applied magnetic field and adequate shielding, the frequency shift of the lock point has a peak-to-peak variation of 1.6 MHz depending on the polarization of the pump field, while when locked to Zeeman sublevels, this variation is reduced to 0.6 MHz. The proposed technique is useful for research involving Rydberg atoms, where large continuous tuning of the laser frequency with stable locking is required.

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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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